| General |
|
Year
|
2018
|
2018
|
|
Manufacturer
|
Yamaha
|
Yamaha
|
|
Model Name
|
WR450F
|
WR450F
|
|
Trim Name
|
Base
|
Base
|
|
Generic Type (Primary)
|
Off-Road
|
Off-Road
|
| Engine |
|
Engine Type
|
Liquid-cooled, DOHC, 4-valve (titanium), single
|
Liquid-cooled, DOHC, 4-valve (titanium), single
|
|
Displacement
|
449cc
|
449cc
|
|
Bore
|
97 mm
|
97 mm
|
|
Stroke
|
60.8 mm
|
60.8 mm
|
|
Compression Ratio
|
12.5:1
|
12.5:1
|
|
Fuel System
|
Keihin 44mm throttle body F.I.
|
Keihin 44mm throttle body F.I.
|
|
Lubrication
|
Wet sump
|
Wet sump
|
|
Ignition
|
TCI
|
TCI
|
|
Starter
|
Electric & Kick
|
Electric & Kick
|
| Drivetrain |
|
Transmission
|
5 speed
|
5 speed
|
|
Gear Ratio (Primary)
|
2.609 (60/23)
|
2.609 (60/23)
|
|
Gear Ratios (overall) 1st
|
2.417 (29/12)
|
2.417 (29/12)
|
|
Gear Ratios (overall) 2nd
|
1.733 (26/15) | Secondary ratio: 3.846 (50/13)
|
1.733 (26/15) | Secondary ratio: 3.846 (50/13)
|
|
Gear Ratios (overall) 3rd
|
1.313 (21/16)
|
1.313 (21/16)
|
|
Gear Ratios (overall) 4th
|
1.050 (21/20)
|
1.050 (21/20)
|
|
Gear Ratios (overall) 5th
|
0.840 (21/25)
|
0.840 (21/25)
|
|
Final Drive
|
O" ring chai
|
O" ring chai
|
| Suspension |
|
Front Suspension
|
Adj. 48mm inverted fork
|
Adj. 48mm inverted fork
|
|
Front Travel (in./cm.)
|
310mm (12.2")
|
310mm (12.2")
|
|
Rear Suspension
|
Fully Adj. Link Monocross
|
Fully Adj. Link Monocross
|
|
Rear Travel (in./cm.)
|
318mm (12.5")
|
318mm (12.5")
|
| Brakes |
|
Front braking system
|
270mm floating disc / twin piston caliper
|
270mm floating disc / twin piston caliper
|
|
Rear braking system
|
245mm disc / single piston caliper
|
245mm disc / single piston caliper
|
| Wheels & Tires |
|
Front Tire
|
80/100-21
|
80/100-21
|
|
Rear Tire
|
120/90-18
|
120/90-18
|
| Dimensions |
|
Length
|
2,165 mm (85.2")
|
2,165 mm (85.2")
|
|
Width
|
825 mm (32.5")
|
825 mm (32.5")
|
|
Height
|
1,280 mm (50.4")
|
1,280 mm (50.4")
|
|
Wheelbase
|
1,465 mm (57.7")
|
1,465 mm (57.7")
|
|
Ground Clearance
|
325 mm (12.8")
|
325 mm (12.8")
|
|
Seat Height
|
965 mm (38")
|
965 mm (38")
|
| Capacities |
|
Fuel Capacity
|
7.5 litres (1.7 Imp. gal.)
|
7.5 litres (1.7 Imp. gal.)
|
| Weights |
|
Weight
|
Wet: 123 kg (271 lbs)
|
Wet: 123 kg (271 lbs)
|
| Color |
|
Colors
|
Yamaha Racing Blue
|
Yamaha Racing Blue
|
|
|
|
|
